Viking Altar Rock

The Viking Altar Rock in Sauk Centre, Minnesota, is a glacial erratic and a local landmark.

The boulder was found in 1943 and is roughly 8.2 m (27 ft) long by 5.2 m (17 ft) wide. It has four roughly triangular holes about 1 meter above the base. The rock is promoted as an attraction as part of a "Trail of the Vikings" featuring supposed evidence of Norse exploration of Minnesota. This is however conjecture.

The "altar" was rededicated in August 1975 with an ecumenical celebration of Mass.